/*
 * Cooperation formats — one architectural panel of 4 horizontal role
 * modules (number → role → task → ARK answer), not 4 separate cards.
 */

.cooperation {
	position: relative;
	background: var(--ark-bg-900);
	padding-block: var(--ark-space-section-lg);
}

.cooperation__header {
	margin-bottom: 56px;
}

.cooperation__overline {
	font-size: 0.8rem;
	font-weight: 700;
	letter-spacing: 0.16em;
	color: var(--ark-text-secondary);
	margin: 0 0 16px;
}

.cooperation__title {
	font-size: var(--ark-fs-h2);
	font-weight: 600;
	line-height: 1.15;
	color: var(--ark-text-primary);
	margin: 0 0 18px;
}

.cooperation__lead {
	max-width: 620px;
	font-size: 1.05rem;
	color: var(--ark-text-secondary);
	margin: 0;
	text-wrap: balance;
}

.cooperation__panel {
	border-top: 1px solid var(--ark-border-medium);
}

.cooperation__row {
	display: grid;
	grid-template-columns: 1fr 1fr 1fr;
	column-gap: 40px;
	padding-block: 32px;
	border-bottom: 1px solid var(--ark-border-medium);
}

.cooperation__row--head {
	padding-block: 28px 20px;
	border-bottom: none;
}

.cooperation__col-label {
	font-size: 0.74rem;
	font-weight: 700;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--ark-text-secondary);
}

.cooperation__role {
	display: flex;
	align-items: baseline;
	gap: 16px;
}

.cooperation__number {
	font-family: var(--ark-font-display);
	font-size: 1.5rem;
	font-weight: 600;
	line-height: 1;
	color: var(--ark-border-titanium);
}

.cooperation__role-title {
	font-size: 1.1rem;
	font-weight: 600;
	color: var(--ark-text-primary);
}

.cooperation__task,
.cooperation__answer {
	margin: 0;
	font-size: 0.98rem;
	line-height: 1.6;
	color: color-mix(in srgb, var(--ark-text-primary) 12%, var(--ark-text-secondary));
}

.cooperation__mobile-label {
	display: none;
}

@media (max-width: 1024px) {
	.cooperation__row--head {
		display: none;
	}

	.cooperation__row {
		grid-template-columns: 1fr;
		row-gap: 16px;
		padding-block: 28px;
	}

	.cooperation__mobile-label {
		display: block;
		font-size: 0.72rem;
		font-weight: 700;
		letter-spacing: 0.1em;
		text-transform: uppercase;
		color: var(--ark-text-muted);
		margin-bottom: 6px;
	}
}

@media (max-width: 640px) {
	.cooperation__header {
		margin-bottom: 40px;
	}

	.cooperation__row {
		row-gap: 10px;
		padding-block: 18px;
	}

	/* Role stays the clear start-of-record: slightly heavier than the
	   task/answer text that follows it in the same mobile stack. */
	.cooperation__role-title {
		font-weight: 700;
	}

	.cooperation__number {
		font-size: 1.3rem;
	}

	/* "Задача заказчика" / "Что делает ARK" read as compact inline service
	   labels rather than full section headings once role/task/answer are
	   stacked. */
	.cooperation__mobile-label {
		margin-bottom: 3px;
		font-size: 0.68rem;
		letter-spacing: 0.08em;
	}

	.cooperation__task,
	.cooperation__answer {
		font-size: 0.95rem;
	}
}